Feeding mechanism for overseaming-machines.



L. ONDERDONKI FEEDING MECHANISM FOR OVERSEAMIIIIG MACHINES,

APPLICATION FILED OCTH'ZEL I913.

l 75,295. PHIQHI'WI Aug. 13', 1918.

3 SHEEIS SHEET 2 awbcmIto'z' wwwoho 4 L. ONDERDONK.

EEEDING MECHANISM FOR OVERSEAMING MACHINES,

.IWPLIC ATIQN FILED 0CT.28, 1913- 1,275,295, PatentedAug. 13, 1918.

3 SHEETSSHEET 3.

ED STATES PATENT OFFICE- LANSING ONDERIDONK, OF NEW YORK, N. Y., ASSIGNOB TO UNI( )N SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

' FEEDING MECHANISM FOR OVEItSEAMING-MACHINES.

- Specification of Lettefr sfatent. I

Patented Aiig. 13, 1918.-

Application and October 28, 1 91's.. Serial No. 797,774. I

larly an overseaming machine known in the art as a cup feed machine.

An ob ect of the invention is to provide a feeding mechanlsm, for intermittently ro.

ta-ting the feed wheels; which shall be simple in construction and of few parts, positively actuated from an eccentric on the main shaft.

A further object of the invention is to provide a feeding mechanism of the above,

character with devices for separating the feed wheels to facllita-te the insertion or removal of the, material.

A still further object of the invention is to provide devices for releasing the tension on the thread for the needle when positioning the feed wheels for the removal of the material. v

These and other objects will in part be obvious andwill in part be hereinafter more fully disclosed.' I

In the drawings which-show by way of illustration one embodiment ofv the invention,

Figure 1 is a side elevation with parts in section showing a. machine embodying my improvements;

Fig. 2 is a bottom plan view of the same,

Fig. 3 is a front view of the machine, certain parts of the feeding mechanism being shown in ,dotted lines;

Fig. 4 is a: detail in section showing the means for limiting the movement of the bracket supporting the outer feed wheel.

The machine as herein illustrated consists of a main casing 1', in which is mounted a main shaft 2, having abelt wheel 3 at each end thereof. A needle bar 4 recip'rocates in I the casing and supports a needle 5. A

looper 6 cooperates with the needle and said looper is mounted on a looper rod 7 WhlOh course, projects slightly is moved so' that the looper enters the 'nee dle loop atone side of the material andthen crosses the material to the opposite side thereof, and presents its loop to the needle.

These parts. so far as the present invention i concerned, mayv be of the usualconstructlo-nl Y The fabric to be stitched is supported in a. substantlally vertlcal position by cooperating feed wheels 8 and 9. The feed wheel 5- 8 is carried by a shaft 10, which is mounted in suitable bearings in a bracket 11 carried by the casingl, The feed wheel 9 isearried by ashaft 12', which is journaled in suitable bearings in a bracket 13. The bracket 13 is pivoted to the bracket 11 by a pivot bolt 14, which extends acrossthe lower part of thebrackets. This bolt 14 is rigidly at-" tached to the outer bracket 13, and the bolt turns freely in bearings formed in the in- .75

nor bracket 11." The inner bracket 11 is bolted-rigidly to the casing by suitable bolts. I 15; At the lower endof the shaft-lOjis a; p a gear 17*ri'g1 idly secured to the lowerend of the shaft gear 16, which meshes with 12-. These two gears are-'so proportioned that they turnthe feed wheelsS and 9- in unison, but in opposite directions so thatthe material to-Xbe stitched maybe clamped between the "feed wheels and held for the stitching ""mechanism. The material, .of

above the feed wheels. 1

The gears attached to the shafts carrying the feed wheels mesh with each otherina vertical plane passing through the axis of the pii ot bolt 1%, and this permits the outer bracket to be moved about the pivot bolt without moving the gears .ou't'of mesh,

- and, therefore, the outerbracket may bet-951 moved carrying-with it, it-s'feed wheeland g thereby separate the feed wheels for the re.- moval or insertion of the fabrlc or materlal to be stitched. The base of the'brackets feed wheels are shaped so as 1100;,

supporting the to house the lower end of the shafts for the feed wheels and the oonnectlng gears. The I dividing line between the brackets lies sub I I sta nti ally in a. vertical .plane passing through the axis of the pivot bolt 14., A guard 1 9 attached to the fixed bracket extends across the dividing line between the bracket and when ,the outer .covers the space formed from the .fixed.

bracket is moved away bracket. This preventsthe ,fa'bric' being stitched from dropping between the brackets and preventing the feed wheels from lock nut -25.

being brought back into normal operative position relative to each other.

The outer bracket is swung-on its pivotal axis by an arm 19 which is rigidly attached to said bracket. This arm 19 has a laterally projecting arm :20 which extends through a slot in the casing. and a leaf spring 21 bears on said arm 20. This leaf spring at its opposite end rests on a lug '22. and a screw '23 passing through a lug 24 engages the leaf spring between its ends and may be used for varying the tension of said spring. Theadjusting screw :23 may be locked in various adjusted positions by a The spring bearing on the outer end of the arm 20 normally holds said arm depressed and this yieldingly presses the feed wheels into contact with each other.

The bracket is moved to separate the feed wheels by a lever 26. which is'pivoted at '27 to the casing and is formed with agroove which extends underneath the arm :20. This lever is: preferably connected to a treadle which. when depressed. raises the arm 20 andthus shifts the bracket to separate the feed wheels.

also desirable. when removing'the fabric. to release the tension on the needle thread. The tension for the needle thread is shown in Fig. 3. and consists of a fixed rod 28 which is mounted in a lug '29 carried by the casing. are pressed together by a spring 31. This spring bears against aplate 32 which in turn bears against the disks. The other end of the spring bears against an adjustable nut- This plate 32 has an extended hearing 3:2 for the disks and also has a ledge 34. A forked arm 35 extends between this ledge and the disks and is fixed to a rod 36 sliding in ears 37 formed on the supporting lug for the tension. A spring 38 encircles said last named rod and bears against one of said ears and against a tiXed collar 39 on the rod. This spring normally presses the collar against'the other car and when in this po sition the forked arm is so disposed that the spring for the tensions will hold the same in contact. In other words. the forked arm is now out of contact with the ledge on the plate. which forces the tensions together. It will readily be seen that if the rod carrying the forked arm is forced to the right. as viewed in Fig.3. the spring for the tensions will be compressed hv a movement of the plate away from the tensions. and the tension disks released.

This rod for releasing the tension on the needle thread is moved endwise by a rock levcr'l l. which is pivoted to the casing at 41.

,. )nc arm of the rock lever bear against the end ofthe rod. while the other arm of the On said rod are disks 30. which rock lever is connected to a link 49, which in turn is connected to the extreme outer end of the lever, which separates the feed wheels. 'hen the lever is depressed this link 42 is raised which swings the rock lever. which. in turn. releases the pressure of the spring on the, tension disks.

The feed wheels are intermittently operated to feed the fabric from an eccentric 43 on the main shaft :2. This eccentric 43 cooperates with an eccentric strap 44, which is formed integral with a link 45 pivoted to a ball st-ud carried by a rock shaft 46. This rock shaft 46 is mounted in suitable lugs 47 on the outer face of the casing. The upper arm 48 of the rock shaft extends through a slot in the casing and carries the ball stud to which said link is pivoted. At the lower end of the rock shaft there is a second arm 49. which is formed with a slot 50. A link 51 is pivoted to a stud 5:2 which is adjustable in said slot 50. l reelv mounted on the.

shaft. carrying the feed wheel 8 is a disk 53.

which disk has an outwardly extending arm 5+ and the link 51 is pivotally attached to the outer end of this arm. 4

Fixed to said shaft is a collar 5:) which is formed with a downwardly projecting fiange 5G. Said disk a t-has a hub 57 attached thereto which isprovided with laterally projecting arms 58. and recesses 5!), Friction clamping members (30. as herein shown four in number. are each provided with aslot which receives the flange 56. These slots are slightly wider than the thickness of the flange. so that \vhensaid friction members are in a radial position the flange can turn freely through the slots. but a slight movement of these friction members from radial position will cause the side walls of the slots to grip the flange. The inner ends of these friction members rest inthe recesses. A spring (31 carried by each arm 58 normally presses against said friction members and tends to force the same to radial position.

it movement of the arm in a counterclockwise direction.as viewed in Fig. 2. will cause the hub to move the inner ends of the clamping members 60. and cause these clamping members to grip the flange 56 and turn the shaft carrying the feed wheel 8. and. through the gear connection between the shafts. aiso turn the feed wheel 9. In order to prevent a retrograde movement of the shaft. when the arm and disk are mov ing in a clockwise direction. I have provided a friction member tizlwhich is also formed with a similar groove edging over the flange 56. This friction gripping mem her has its outer end extending into a recess (i-l in a bracket (34. spring bears against this friction member and normally holds the same out of gripping contact with the flange, when said flange is moved in proper direction tofeed. the fabric, but said gripp ng member engages the flange and prevents a backward movement of the feed wheel when thekfriction members are moved backward for gripping the flange for the next feed movement.

An adjustable screw 61 passes through the frame directly below the arm and limitsjthe downward movement of said arm through the action of the leaf spring '21. An adjustable screw 62 also passes through the frame and limits the upward movement of the arm 20, and this limits the outward throw of the bracket 12 when the outer end of the lever 26 is depressed.

While-I'have stated that my present in-.,

yention is directed to a feeding mechanism, it will be understood that I have used this term in its broadest sense, and as covering not only the actual reed of the fabric, but the 1 mechanism for shifting the feed wheels to permit the removal or insertion of the fabrm, and also the mechanism which operates to release the tension so'that'ithe fabric may be quicklywithdrawn from the machine.

'It is obvious that minor changes in the details .of construction and the arrangement of parts may be made, without departing from the spirit of the invention, as set forth in the appended claims.

Having thus described my invention, what I claim is:

1. sewing machine including'in combination a casing, a main shaft'extending into said casing, stitch forming mechanism, feed wheels for supporting and feeding-a fabric in substantially a vertical plane to the stitch forming mechanism, and means for actuating said feed wheels including a vertically disposed rock shaft, an arm fixed to said rock shaft-at the upper end thereof, means actuated by the main-shaft for oscillating said arm, an arm connected to the lower end of said rock shaft, and devices actuated thereby for intermittently rotating the feed wheels, said last named devices being adjustable whereby the throw of the feed wheels may 'be varied.

2. A sewing machine including in combination a cas ng, a main shaft extending into said casing, stitch forming mechanism,

feed wheels for supporting and feeding a 7 lane to.

fabric in'substantially a vertical the stitclfforming mechanism,- an means for actuating'said feed wheels including a vertically disposed shaft, bearings on the outer face of faid casing in which said shaft is journaled, an arm carried by the upper end of said shaft and extending through a slot in said casing to the inside there0f,an eccentric or. the main shaft connected to said arm for. oscillating'said vertical shaft, an

. arm at the lower end of said'vertical shaft extending in a direction substantiallyparallel to'one wall of the casing, and devices operated by said last named arm for inter..

mittently rotating said feed wheels.

3. A sewing machine including in combi- I nation aasing, a main shaft extending into said casin stitch forming mechanism, feed I wheels for supporting and feeding a fabric in substantially a vertical plane to the stitch forming mechanism, and means. for actuating said feed wheelsincluding a vertically disposed shaft, hearings on the outerface of said casing in which said shaft is journaled, an arm carried Joy the upper end of saidshaft and cxtendingthrough a slot in said casing to the inside thereof, an eccentric on the main shaft connected to said arm for oscillating said vertical shaft, an arm at the lower end of said vertical shaft extending in a direction substantially parallel to one wall of the casing, and devices operated by said last named arm for intermittently rotating 'sald feed wheels, said devices including a said shaft and extending through a slot in said casing to the inside thereof, an eccentric on the main shaft connected to said arm for o-sci'llatingsaid vertical shaft, an arm at the lower end of said vertical shaft extending in a direction substantially parallel to one wall of the casing, and devices operated by said last named arm for intermittently rotating said. feed wheels, said devices including a link adjustably connected with said arm and extending through a slot in'said casing, and

devices connected to the other end'of said link for' intermittently rotatingthe feed wheels. 7

5. A sewing machine including in combination a casing, a main shaft extendingjnto said casing; stitch forming mechanism, feed wheels for supporting and feeding a fabric in substantially a vertical plane to the stitch forn'iing mechanism, and means for actuating said feed wheels including a vertically "disposed shaft, hearings on the outer face of said casing in which said shaft is journaled,'an arm carried by the upper end of said shaft'and extending through a slot in said casing to the inside thereof, an eccentric on the main shaft connected to said arm for oscillating said vertical shaft, an arm at the lower end of saidvertical shaft eirtending in a direction substantially parallel to one wall of the casing, and devices operated by said last named arm for intermittently rotating said feed wheels, said last named devices including an oscillating tion gripping members controlled. thereby, and a friction gripping member for preventing a retrograde movement of the feed wheels.

(S. A sewing machine including in combination a casing, a main shaft extending into the casing, stitch forming mechanism operated by said main shaft, opposed feed wheels for supporting and feeding the fabric in sub stantially a vertical plane to the stitch forming mechanism, a bracket fixed to the casing, a shaft located in said bracket and supporting one of said wheels, means for intermittently rotating said shaft from the main shaft, a bracket pivoted to said casing, a ,shaft supporting the other feed wheel journaled in said pivoted bracket, gears for connecting the lower ends of the shafts for the feed wheels, the pivotal connection between said brackets consisting of a rod fixed to the outer bracket and freely journaled on the inner bracket, means connected to said rod for oscillating the same, to move the outer bracket to separate the feed wheels, and a leaf spring operating through said rod for moving said pivoted bracket to normally hold said feed wheels in gripping contact, and means whereby the tension of said leaf spring may be varied.

7. A sewing machine including in combination a casing, a bracket secured to said casing, a feed wheel, a shaft supporting said feed wheel journaled in said bracket, a second bracket pivoted to the first named bracket, a feed wheel, a shaft supporting said last named feed wheel, journaled in said pivoted bracket, gears for connecting the feed shafts, said brackets being formed I brackets and extending over disk and the 1 newness so as to; house said gears and having their meetingedges located in substantially a vertical plane passing between the feed Wheels, and a guard connected to one of said the edge of the other whereby the space between themeeting edges of thebrackets will be covered.

8. A" sewing machine including in combination a casing, a main-shaft extending into said casing, stitch forming mechanism, feed wheels for supporting and feeding a fabric in substantially a vertical plane to the stitchforming mechanism, and means for actuating said feed wheels including a vertically disposed shaft,'bearings on one face of the casing in which said shaft is journaled, an arnrcarried by the upper an eccentric on'the main shaft connected to said arm for oscillating said vertical shaft, an arm at the lower end of said vertical shaft, and devices operated by said' last named arm for intermittently rotating said feed wheels, said devices being adjustably connected to said last-named arm whereby the throw of the feed wheel may'be varied.

9. A sewing machine including in combination a casing, feed wheels for feed wheels, a bracket pivoted to the casing for supporting the outer feed wheel, an arm attached to the bracket for swinging the,

end of the shaft,

feeding the fabric, vertical shafts for supporting the 

